<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script type="text/javascript">
			var m = "3";// string
			var n = 3;// number
			if (m == n) { // 只比较值是不是相等
				console.log("m==n");
			}
			
			if (m === n) {// 要求值一样，类型也一样
				console.log("m===n");
			}
		</script>
	</head>
	<body>
	</body>
</html>
